Replacing Carbon Brushes - Makita BFR440 Manual De Instrucciones

screw will be automatically carried to the driving position
and fastened.
CAUTION:
• Always check the bit carefully for wear before driving
operations. Replace a worn bit or poor fastening may
result.
• Always hold the tool squarely against the driving sur-
face. Holding it at an angle may damage the screw
heads and cause wear on the bit. This may also lead to
poor fastening.
• Always keep the tool firmly against the driving surface
until the driving is over. Failure to do so may cause
insufficient fastening of screws.
• Be careful not to drive a screw onto another screw
already fastened.
• Do not operate the tool without screws. It will damage
the driving surface.
• If the feeder box does not work smoothly when driving
screws, spray car wax (spray type) on the sliding sur-
faces. Never lubricate it.
Driving in corner (Fig. 14)
This tool can be used to drive at a position 15 mm away
from the wall as shown in the figure.
CAUTION:
• Driving at a position closer than 15 mm to the wall or
driving with the stopper base in contact with the wall
may damage the screw heads and cause wear on the
bit. This may also lead to poor fastening of screws and
malfunction of the tool.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and the bat-
tery cartridge is removed before attempting to perform
inspection or maintenance.

Replacing carbon brushes

Replace when they wear down to the limit mark. Keep the
carbon brushes clean and free to slip in the holders. Both
carbon brushes should be replaced at the same time. Use
only identical carbon brushes. (Fig. 15)
Loosen the thumb screws which secure the casing. Pull
out the casing in the direction of the arrow. (Fig. 16)
Use a screwdriver to remove two screws then remove the
front cover. (Fig. 17)
Raise the arm part of the spring and then place it in the
recessed part of the housing with a slotted bit screwdriver
of slender shaft or the like. (Fig. 18)
Use pliers to remove the carbon brush caps of the carbon
brushes. Take out the worn carbon brushes, insert the
new ones and replace the carbon brush caps in reverse.
(Fig. 19)
Make sure that the carbon brush caps have fit into the
holes in brush holders securely. (Fig. 20)
Reinstall the front cover and tighten two screws securely.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.
ACCESSORIES
CAUTION:
• These accessories or attachments are recommended
for use with your Makita tool specified in this manual.
The use of any other accessories or attachments might
present a risk of injury to persons. Only use accessory
or attachment for its stated purpose.
If you need any assistance for more details regarding
these accessories, ask your local Makita Service Center.
• Drywall screw strip
• Phillips bit
• Plastic carrying case
• Various type of Makita genuine batteries and chargers
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